Door-jack.



J. G. WARNER.

DOOR JACK. APPLICATION FILED 11120, 1911.

Patented Feb.20, 1912.

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JACOB C. WARNER, OF STOCKTON, CALIFORNIA.

DOOR-JACK.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Application filed April 20, 1911. Serial No. 622,414.

To all whom it may concern:

Be it known that I, JACOB C. WARNER, a citizen of the United States,residing at Stockton, in the county of San Joaquin, State of California,have invented. certain new and useful Improvements in Door- Jacks; and Ido declare the following to be a full, clear, and exact description ofthe same, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the characters of reference markedthereon, which form a part of this application.

This invention relates to improvements in jacks for lifting differentmembers and particularly to a door jack for lifting and adjusting doorsfor the purpose of fitting looks or hinges, the object of the inventionbeing to produce a jack which will lift the door easily and readily toany degree desired from a fraction of an inch to two or three inches asmay be found adaptable.

A further object of the invention is to produce such a jack as willpermit the door to be lifted and held to any point desired regardless oftheir infinitesimal difierence.

A still further object of the invention is to produce a simple andinexpensive device and yet one which will be exceedingly effective forthe purposes for which it is de signed.

These objects, I accomplish by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claim.

In the drawings similar characters of reference indicate correspondingparts in the several views.

Figure 1 is a side elevation of the complete door jack. Fig. 2 is avertical section of the same. Fig. 3 is a top plan view of a lockingb'ar. Fig. 1 is a bottom plan view of the forward end of the device.

Referring now more particularly to the charaetersof reference on thedrawings 1 designates the base provided with a vertical post 2 and withside wings 3.

4 designates the top bar of the device which has the reduced end 5resting on and projecting parallelly to the base 1. Said member 4: hasside wings 6 connected by a cross rod 7 with the wings 3, said pin 7being on one side of the post 2 and there being another pin 8 projectingacross from the wings 4 on the other side of the post 2.

The numeral 9 indicates a spring bearing against the base 1 and disposedaround the pin 7 and bearing against the plate 42.

The numeral 10 indicates a locking bar mounted over the pin 2 and havingits central orifice 11 disposed obliquely with respect to the verticalplane of the post 2. This rod rests normally on the pin 8 and since thespring 9 presses against the plate 1 and causes it to have a tendency toremain in closed position, this will cause the pin 8 to bear against theplate 10 and causes the sides of its obliquely disposed orifice 11 toimpinge against the post 2 thus holding the plate 4: by such frictionalcontact at any point to which it may be pressed from its outer end P.

12 is a spring wire clip member projecting into the bar 10 and having ahandle member 13 projecting from the plate 41 whereby the locking bar 10may be released from its frictional contact with the post 2 and thuspermit the member 4 to be returned to closed or partly closed positionas may be desired.

In operation the fiat end 5 of the plate 4 is inserted under the bar ormember to be lifted, and then the outer end 4 which is spaced from theplate 1 is pressed by the foot or other means causing the end. 5 to moveupward carrying with it whatever there is disposed thereon and thelocking structure described will hold it in any position it may be movedto until the same is released by pressing the member 13 as described.

The numeral 14 designates bottom lugs which may bite into the floor orother surfaces to hold the plate 1 from slipping while the device isbeing used and similarly the member 5 may be provided with serratedmembers 15 to bite into the member which is being lifted to preventslipping.

From the foregoing description it will readily appear that I haveproduced such a device as substantially fulfils the objects of theinvention as set forth herein.

While this specification sets forth in detail the present and preferredconstruct-ion of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention.

Having thus described my invention What I claim as new and useful anddesire'to secure by Letters Patent is:

A device of the character described comprising a bottom member having avertical post and side Wings, a top member having Wings, a pin disposedthrough said Wings on said bottom and top members hinging them together,another cross pin on the Wings of said upper plate, a locking barnormally resting on said last named pin and disposed over said verticalpost in a manner obliquely with respect to the vertical plane of saidpost, and a spring Wire finger member secured to said locking bar andprojecting through said top plate as described.

In testimony whereof I aflix my signature in presence of two Witnesses.

JACOB C. AR-NEH. Witnesses:

PERCY S. l VEBSTER, JosHUA B. VVEBsTnR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

